<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Turn on/off</title>
<script src="js/bulb.js" type="text/javascript"></script>
</head>
<body>
	<img onclick="changeBulb();" 
		 onmouseover="changeBulb();" 
		 onmouseout="changeBulb();" 
		 src="imgs-bulb/pic_bulboff.gif" alt="bulb" id="bulb"/>
	<button onclick="changeBulb();">Click me</button>
</body>
</html>